Sash-balance.



N.o. 628,34|. Patented July 4, 1899.. F. J. LOWERY & r. E. BILLINGS.

SASH BALANCE.

(Application filed Mar. 29, 1899.)

No Model.)

5] 7f, 6 mi emwm,

I r CC CEE CE UNITED STATES PATENT OFFICE.

FRANK J. LOWERY AND FRANK E. BI LLINGS, F FORT FAIRFIELD, MAINE.

SASH-BALANCE.

SPECIFICATION forming part of Letters Patent No. 628,341, dated'July 4, 1899.

Application filed March 29, 1899. Serial No. 710,984. (No model.) i

To all whom it may concern.-

Beit known that we, FRANK J. LOWERY and FRANK E. BILLINGS, citizens of the United States,residing at Fort Fairfield, in the county of Aroostook and State of Maine, have invented certain new and useful Improvements in Window-Sash Balances; and we do declare the following to be a full, clear, and exact description of the invention, suchas will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters-of reference marked thereon, which form a part of this specification.

This invention relates to new and useful improvements in sash-fasteners, in which provision is made for balancing the sash at different locations and in preventing the sash from binding against the side of the casing as it is raised and lowered, and in carrying out the present invention it is our purpose to generally improve upon the construction of the sash-fastener upon which we have been granted Letters Patent of the United States, No. 620,468, of February 28, 1899.

More specifically the present invention resides in the provision of a sash-fastener .in

which a spring-actuated pinion carried in a recess in the casing of the window is designed to engage with teeth of a rack-bar secured to or forming a part of the window-frame, antifriction-rollers being carried by the windowframe, preferably at its upper end, and on the side provided with a rack-bar, which rollers are provided for the purpose of causing the longitudinal edge of the sash adjacent to the pinion to hug the pinion and by so doing prevent frictional contact on the opposite side of the sash from that having the rack-bar.

To these ends and to such others as the invention may pertain the same consists, further, in the novel construction, combination, and adaptation of parts, as will be hereinafter more fully described and then specifically defined in the appended claim.

Our invention is clearly illustrated in the accompanyingdrawings, which, with the letters of reference marked thereon, form apart of this specification, and in which drawings I similar letters of referenceindicate like parts throughout the several views, in which- Figure 1 is a central vertical sectional view through the casing and the window-sash. Fig. 2 isasectional viewhorizonlally through the window-casing on line 2 2 of Fig. 1; and Fig. 3 is an enlarged detail viewof the antifriction-rollers, showing the manner of their connection with the window-sash.

Reference now being had to the details of the drawings by letter, A designates the sash of the window, which has one of its longitudinal edges formedinto a rack-bar B, having teeth B thereon, and secured to the upper end of said sash, at the corner adjacent to the upper end of the rack-bar, is a plate 0, the contracted end of'which extends over the end of the sash and overhangs the upper end of the rack-bar, and journaled at the end of said contracted portion of the plate, on the bearing D, are the two antifriction-rollers E, which are separated fromeach other a slight distance, as shown clearly in the drawings.

Seated in a recess in one side of the casing is a spring-actuated pinion H, mounted in a suitable boxing K, and secured to said pinion is one end of a coiled spring G, the other end of which spring is secured to a stub-shaft on which said pinion is mounted, whereby the tension of said spring may be utilized in the raising of the sash. The plate forming the bottom of the groove in which said rackbar slides when the teeth thereof are held in mesh with the teeth of the said pinion is longitudinally slotted, as shown at M, for the entire length of said casing above the pinionwheel and terminates at its upper end in an enlarged apertured portion M. WVhen it is desired to apply the sash to the casing, the friction-wheels are passed through said enlarged aperture M, -with the contracted shanked. portion of the plate carrying the antifriction-wheels extending through said slot, and the said antifriction-wheels are designed to contact with the rear faces of said plate M, adjacent to the longitudinal slot therein, and to hold the teeth of the-rack-bar against the pinion as the sash is raised and lowered, thus producing a balanced sash, also preventing any binding of the opposite longitudinal edge of the sash against the casing.

By constructing-a sash in'accordance with the construction shown in our drawings it will be apparent that the sash may held at any location, and when used in connection with a stop, as shown in our former patent, it will prevent any binding against the opposite edge of the sash from that having contact with the spring-actuated pinion-wheel.

Having thus described our invention, what we claim as new, and desire to secure by Letters Patent, is-

In combination with the sash having the rack-bar and spring-actuated pinion seated in the recess of the window-casing, the plate C secured to the upper edge of the lower sash, said plate having shoulders flush with the corner of the sash and a contracted por- I 5 tion projecting over the end of the sash and through an elongated slot in the window-casing, a stub-shaft carried at the end of said contracted portion of the plate, and rollers jonrnaled on each end of the stub-shaft, sub- 20 

